MDEV-24188: Merge 10.2 into 10.3

storage/innobase/include/dyn0buf.h

@@ -330,6 +330,24 @@ public:
 		return(true);
 	}
 
+	/**
+	Iterate over each block and call the functor.
+	@return	false if iteration was terminated. */
+	template <typename Functor>
+	bool for_each_block(const Functor& functor) const
+	{
+		for (typename list_t::iterator it = m_list.begin(),
+					       end = m_list.end();
+		     it != end; ++it) {
+
+			if (!functor(&*it)) {
+				return false;
+			}
+		}
+
+		return(true);
+	}
+
 	/**
 	Iterate over all the blocks in reverse and call the iterator
 	@return	false if iteration was terminated. */

storage/innobase/include/mtr0mtr.h

@@ -437,10 +437,9 @@ struct mtr_t {
 	static inline bool is_block_dirtied(const buf_block_t* block)
 		MY_ATTRIBUTE((warn_unused_result));
 
-	/** Get the buffer fix count for the block added by this mtr.
-	@param[in]	block	block to be checked
-	@return number of buffer count added by this mtr */
-	int32_t get_fix_count(const buf_block_t *block);
+	/** Check if we are holding a block latch in exclusive mode
+	@param block  buffer pool block to search for */
+	bool have_x_latch(const buf_block_t& block) const;
 private:
 	/** Prepare to write the mini-transaction log to the redo log buffer.
 	@return number of bytes to write in finish_write() */

storage/innobase/include/sync0rw.h

@@ -508,7 +508,7 @@ the pass value == 0. */
 bool
 rw_lock_own(
 /*========*/
-	rw_lock_t*	lock,		/*!< in: rw-lock */
+	const rw_lock_t*lock,		/*!< in: rw-lock */
 	ulint		lock_type)	/*!< in: lock type: RW_LOCK_S,
 					RW_LOCK_X */
 	MY_ATTRIBUTE((warn_unused_result));